org.eclipse.viatra.query.runtime.api.scope

Interface IBaseIndex

All Known Implementing Classes:

EMFBaseIndexWrapper

public interface IBaseIndex

Represents the index maintained on the model.

Since:

0.9

Method Summary

Modifier and Type	Method and Description
void	addBaseIndexChangeListener(ViatraBaseIndexChangeListener listener) Adds a coarse-grained listener that will be invoked after the NavigationHelper index or the underlying model is changed.
boolean	addIndexingErrorListener(IIndexingErrorListener listener) Adds a listener for internal errors in the index.
boolean	addInstanceObserver(IInstanceObserver observer, java.lang.Object observedObject) Register a lightweight observer that is notified if any edge starting at the given Object changes.
<V> V	coalesceTraversals(java.util.concurrent.Callable<V> callable) The given callback will be executed, and all model traversals and index registrations will be delayed until the execution is done.
void	removeBaseIndexChangeListener(ViatraBaseIndexChangeListener listener) Removes a registered listener.
boolean	removeIndexingErrorListener(IIndexingErrorListener listener) Removes a listener for internal errors in the index
boolean	removeInstanceObserver(IInstanceObserver observer, java.lang.Object observedObject) Unregisters a lightweight observer for the given Object.
void	resampleDerivedFeatures() Updates the value of indexed derived features that are not well-behaving.

Method Detail

coalesceTraversals

<V> V coalesceTraversals(java.util.concurrent.Callable<V> callable)
                  throws java.lang.reflect.InvocationTargetException

The given callback will be executed, and all model traversals and index registrations will be delayed until the execution is done. If there are any outstanding feature, class or datatype registrations, a single coalesced model traversal will initialize the caches and deliver the notifications.

Parameters:

callable -

Throws:

java.lang.reflect.InvocationTargetException

addBaseIndexChangeListener

void addBaseIndexChangeListener(ViatraBaseIndexChangeListener listener)

Adds a coarse-grained listener that will be invoked after the NavigationHelper index or the underlying model is changed. Can be used e.g. to check model contents. Not intended for general use.

See removeBaseIndexChangeListener(ViatraBaseIndexChangeListener)

Parameters:

listener -

removeBaseIndexChangeListener

void removeBaseIndexChangeListener(ViatraBaseIndexChangeListener listener)

Removes a registered listener.

See addBaseIndexChangeListener(ViatraBaseIndexChangeListener)

Parameters:

listener -

resampleDerivedFeatures

void resampleDerivedFeatures()

Updates the value of indexed derived features that are not well-behaving.

addIndexingErrorListener

boolean addIndexingErrorListener(IIndexingErrorListener listener)

Adds a listener for internal errors in the index. A listener can only be added once.

Parameters:

listener -

Since:

0.8.0

removeIndexingErrorListener

boolean removeIndexingErrorListener(IIndexingErrorListener listener)

Removes a listener for internal errors in the index

Parameters:

listener -

Since:

0.8.0

addInstanceObserver

boolean addInstanceObserver(IInstanceObserver observer,
                            java.lang.Object observedObject)

Register a lightweight observer that is notified if any edge starting at the given Object changes.

Parameters:

observer - the listener instance

observedObject - the observed instance object

Returns:

false if no observer can be registered for the given instance (e.g. it is a primitive), or observer was already registered (call has no effect)

removeInstanceObserver

boolean removeInstanceObserver(IInstanceObserver observer,
                               java.lang.Object observedObject)

Unregisters a lightweight observer for the given Object.

Parameters:

observer - the listener instance

observedObject - the observed instance object

Returns:

false if no observer can be registered for the given instance (e.g. it is a primitive), or no observer was registered previously (call has no effect)